Flour-bolt



UNITED STATES PATENT OFFICE.

ROBERT S. VILLIAMS, OF RED ING, MINNESOTA.

FLOUR-BOLT.

SPECIFICATION forming part of Letters Patent No. 419,236, dated January14, 1890.

Application filed May 9, 1888. Serial No. 273,348. (No model.)

To all whom it may concern.-

Be it known that 1, ROBERT S, WILLIAMS, a citizen of the United States,residing at Red WVing, in the county of Goodhue and State of Minnesota,have invented certain Improvements in Flour-Bolts, of which thefollowing is a full and clear description, reference being had to theaccompanying drawings, forming part of this specification, in whichFigure 1 represents, partly in elevation and partly in section, aflour-bolt embodying my invention. Fig. 2 is a transverse sectional viewof the bolt. Fig. 3 is a detail perspective View of one of the metalplates.

My invention relates to flour-bolts; and it consists in the peculiarconstructions and combinations of elements, which I shall hereinafterfully describe and claim.

To enable others skilled in the art to make and use my invention,l willnow describe the same and indicate the manner in which I carry the sameout.

In the said drawings, A represents the outer cylinder of a floui bolt,and consists of the usual heads or end pieces and the external coveringa, of silk or wire-cloth.

Passing longitudinally through the cylinder A, and secured to the headsor end pieces and to the external covering a, if desired, are the fixed.ribs Z), to the inner sides of which are secured plates or carriers 0,formed by suitable material and projecting to one side of the fixedribs, thereby forming pockets, into which the material or stock fallsduring the rotary movement of the bolt, and by which means a portion ofthe material is elevated by said pockets during their upward movements,thereby increasing the capacity of the bolt.

In addition to the ribs Z), other ribs (1, known as skeleton ribs, aresuitably secured inside of the cylinder at points between the fixed ribs1), and are connected with an inner series of ribs 6 by means of thebolts f or other suitable devices, and are separated from the skeletonribs a sufficient distance to permit the material to pass between ribs dand e on the upward and downward movement of the carriers.

In addition to the outer cylinder, as previously described, the bolt isprovided with an inner cylinder B, of suitable diameter, secured to theouter cylinder in any appropriate manner, whereby it rotates with saidouter cylinder. This inner cylinder is divided transversely into zonescomprising sections m, of silk or wire-cloth, and metal plates 01,arranged longitudinally and alternately, as shown in Fig. 1, the plateshaving their inner surfaces roughened or corrugated, and inside of theinner cylinder is arranged the shaft C, which carries triangular orother shaped heads g, to which longitudinal bars 71 are bolt-ed, asshown in Fig. 2, the said bars being provided with or having secured tothem brushes Z, which brush and beat the stock or material which isplaced in the inner cylinder against the alternate wire and corrugatedsections of the inner cylinder, whereby said material is agitated andseparated by the brushes, the finer material pass ing through the innersections to the outer cylinder, where it is finished and bolted, whilethe coarser material and impurities pass along the inner cylinder andare discharged at one end thereof in the usual manner.

Motion is imparted to the cylinders in any well-known and suitablemanner, and also to the shaft, and said shaft may or may not revolve ata different rate of speed from that of the cylinders.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. An improved flour-bolt comprising an outer cylinder, an innercylinder divided transversely throughout its length into zones ofalternate perforate and imperforate material, said imperforate materialhaving its inner surface roughened, and a rotary brush within the innercylinder, substantially as herein described.

2. An improved flour-bolt comprising an outer cylinder, an innercylinder formed of zones and consisting of the wire-cloth sec- ROBERT S.\VILLIAMS.

Witnesses:

J. BoHMBAoH, J r., A. D. HoYT.

IOO

